---
title: "Why do humans have different blood group types?"  
description: "A short explanation of why humans have different types of blood groups"  
author: "Anjita D."  
published: 2023-11-08  
canonical: https://yourviews.mindstick.com/story/3167/why-do-humans-have-different-blood-group-types  
category: "science"  
tags: ["blood group types", "human", "science", "facts", "general knowledge"]  
reading_time: 1 minute  

---

# Why do humans have different blood group types?

![Why do humans have different blood group types](https://yourviews.mindstick.com/stories/e5273877-b8e4-4910-b606-f226a3968deb/images/5ffafbf2-c073-4093-a0f9-52832e50d56d.jpeg) ![Why do humans have different blood group types](https://yourviews.mindstick.com/stories/e5273877-b8e4-4910-b606-f226a3968deb/images/2e81e5c1-96fd-4289-8c90-cd1dc0b6a7a8.jpeg) The presence or lack of particular antigens on red blood cells is determined by the ABO gene on chromosome 9, resulting in different blood groups. ![Why do humans have different blood group types](https://yourviews.mindstick.com/stories/e5273877-b8e4-4910-b606-f226a3968deb/images/68cd36e9-083e-452c-aa8a-d6f48d448a3c.jpeg) The four main blood groups are A, B, AB, and O, each with its own RhD antigen, resulting in Rh-positive or Rh-negative blood. ![Why do humans have different blood group types](https://yourviews.mindstick.com/stories/e5273877-b8e4-4910-b606-f226a3968deb/images/fcde3447-b741-471d-a35a-726d5cc77161.jpeg) The ABO gene, consisting of three main alleles: A, B, and O, determines a person's blood group, a combination of alleles inherited from their parents. ![Why do humans have different blood group types](https://yourviews.mindstick.com/stories/e5273877-b8e4-4910-b606-f226a3968deb/images/0fd82fa2-0b96-4775-90e7-33f10bc67642.jpeg) Individuals with two A alleles have type A blood, while those with two B alleles have type B blood. ![Why do humans have different blood group types](https://yourviews.mindstick.com/stories/e5273877-b8e4-4910-b606-f226a3968deb/images/feac842b-3f9f-4373-899d-7eb0155bb760.jpeg) Furthermore, individuals with type AB blood inherit one A and one B allele, while those with type O blood inherit two O alleles.

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Original Source: https://yourviews.mindstick.com/story/3167/why-do-humans-have-different-blood-group-types

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